Note 11 - Fair Value Measurements - Assets Recorded at Fair Value on Non-recurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Real estate owned	$ 145	$ 254
Impaired mortgage servicing rights	432	1,063
Fair Value, Inputs, Level 1 [Member]
Real estate owned	0	0
Impaired mortgage servicing rights	0	0
Fair Value, Inputs, Level 2 [Member]
Real estate owned	0	0
Impaired mortgage servicing rights	0	0
Fair Value, Inputs, Level 3 [Member]
Real estate owned	145	254
Impaired mortgage servicing rights	$ 432	$ 1,063